CN104781902B - Actuator of the actuator with pyromagnetic part flow arrangement particularly for triggering breaker - Google Patents
Actuator of the actuator with pyromagnetic part flow arrangement particularly for triggering breaker Download PDFInfo
- Publication number
- CN104781902B CN104781902B CN201380058281.XA CN201380058281A CN104781902B CN 104781902 B CN104781902 B CN 104781902B CN 201380058281 A CN201380058281 A CN 201380058281A CN 104781902 B CN104781902 B CN 104781902B
- Authority
- CN
- China
- Prior art keywords
- actuator
- coil
- magnetic
- flow arrangement
- part flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/142—Electrothermal mechanisms actuated due to change of magnetic permeability
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/081—Magnetic constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
- Breakers (AREA)
Abstract
The present invention relates to a kind of electromagnetic actuators (10), the electromagnetic actuators are provided with saturable magnetic separate system (18).The separate system (18) is associated with the coil (14) of actuator (10), and allows to link up almost most of flux (B) according to the electric current (I) for circulating in the product.By this way, when in breaker, actuator (10) allows breaker to be triggered in short circuit as usual, and also due to triggering when acting on overload of separate system.
Description
Technical field
The present invention relates to the dropout of the electric protective equipment of such as breaker etc, especially in low-pressure field.More typically
Ground, the electromagnetic actuators of the single trip gear the present invention relates to can act as cutting unit.
Background technology
In case of a fault, especially in short circuit, when intensity exceedes high threshold, or in the event of overloading, when
But when intensity is maintained close to continue the long duration in the value of nominal strength, breaker is provided by cutting off electric current
Protection to electric wiring.
In order to meet safety standard, generally and as shown in figure 1, most of modularized circuit breakers 1 are equipped with two types
Trip gear, the trip gear is connected to circuit to be protected：Electromagnetic actuators 2 separate in case of a short circuit contact 4,
6, and 8 pairs of overloads of the thermal release device of bimetal strip type are made a response, for example, see FR 2 682 533.Depending on breaker
Scope, electromagnetic actuators 2 can take variously-shaped, especially with solenoid plunger, go out as described above with regard to fig.1, or tool
There is armature, as described in FR 2 772 981.
The presence of two different elements 2,8 provides the independent control pair the parameter related to the dropout in two types failure
System.But, it is this to have attempted to and bimetal strip/actuator design after tested needs sufficiently in the housing of breaker 1
Space, and it is related to multiple sizable parts to be assembled.
Sometimes, it is considered to the demand in two elements is removed, for example, by using described in US 2 690 528
Magnetic-liquid actuator (or buffer), or returned using quick bimetal strip system (referred to as circular bimetal strip, such as
Described in EP 1 001 444).Except the intrinsic shortcoming of these designs (is respectively the limit of control difficulty and rupturing duty
System) outside, but these technical schemes retain two operating principles being paired to together.
The content of the invention
In other advantages, the present invention is particularly intended to overcome the shortcoming of existing tripping device for circuit breaker, especially by carrying
For a kind of new electromagnetic actuators, the electromagnetic actuators are able to ensure that and are threaded off under short circuit and overload condition.
In one aspect of the invention, thus the present invention relates to a kind of electromagnetic actuators, the electromagnetic actuators provide use
It is fixed in the case of two kinds when in the duration that electric current overrate is persistently grown and when electric current exceedes threshold value once in a while
Contact motion thereon.
The invention particularly relates to a kind of electromagnetic actuators, wherein, shunt magnetic device is fitted at coil, relative to magnetic flux
Paths in series, the part flow arrangement includes pyromagnetic (or magnetic heat) material, i.e. such material, the magnetization of the material is with temperature
Strengthen on the first temperature more than or equal to 330K, and especially show peak value, the maximum of the peak value is more than
40emu/g, and magnetize quick increase between 350 and 420K under 0.2 to 2T magnetic field.Magneto-caloric material particularly nickel and manganese
Alloy, preferably NiCoMnX types, wherein, X is selected from aluminium, indium, antimony or tin.
Such actuator is traditional, and with magnetic circuit, the magnetic circuit is including fixed magnetic frame, in end
It is connected to the coil of circuit and according to the intensity in the dynamic electric current of the coil midstream relative to the moveable magnetic of the framework
Property element.Especially, moveable magnetic element can be solenoid plunger, and the solenoid plunger is moved within coil, and
And the plunger and coil are received in the frame.Alternately, moveable magnetic element can be armature type, have
U-frame frame, at least one branch of the U-frame frame by coil around, and the armature relative to branch's movement of U-shaped closing
It.
Part flow arrangement can extend along the axis of coil, especially in the inner side for solenoid plunger actuator.It is excellent
Selection of land, with the shape of cylinder, it integrally can be formed by magneto-caloric material, or its effect can wherein be used by adjustment
The degree of magneto-caloric material adjust.The size of cylinder is also suitable for part flow arrangement relative to the electric current institute flowed in coil in itself
Desired power.
Electromagnetic actuators can be fitted in cutting unit, and especially in modularization molded case circuit breakers, cut-out is single
One of contact of unit is couple to the displaceable element of actuator, so that the electric current that basis flows in coil is opened or is closed
Circuit.Especially, actuator can form the device for this cutting unit of threading off, then it is single that the coil is couple to cut-out
Unit is set the circuit to be protected to it, and displaceable element can be couple to the movable contact of unit, for example, with firm
The mode of property.
Brief description of the drawings
From the description of following only certain exemplary embodiments of this invention, other advantages and features will be apparent, described to retouch
State and be given and not limited by means of explanation, they are shown in the drawings.
Fig. 1 has been described, and is shown in which that the low-pressure molding case circuit breaker of actuator of the invention can be equipped with
Device；
Fig. 2 shows the characteristic of the material that can be used in the part flow arrangement of actuator of the invention；
Fig. 3 shows actuator according to the embodiment of the present invention, and illustrates the magnetic according to the electric current for flowing wherein
Induction force；
Fig. 4 shows another implementation method of breaker of the invention.
Specific embodiment
According to the present invention, the effect of bimetal strip is substituted by saturable shunt magnetic system in tripping system, the shunt magnetic
In common electromagnetic actuators, the electromagnetic actuators keep the effect threaded off when its is short-circuit for system combination.It is related to actuator
Thus the shunting of connection plays the function of being threaded off during overload.
For this purpose, the material of separate system is chosen, for its pyromagnetic or magnetic thermal characteristics.More specifically, such as Fig. 2 institutes
Show, the material is so that its magnetization degree M shows the peak value related to temperature.Especially, at low temperature, the material is less
It is magnetic or even at all without magnetic.When a temperature increases, more than the first temperature T0, the magnetization M of material quickly strengthens,
Second temperature T1Maximum is reached, more than second temperature, magnetization reduces, until it cancels under the Curie temperature Tc of material.This
A little various temperature T0、T1, Tc depends on applied magnetic field H and (obtained for the magnetic field of 0.2T and the magnetic field of 7T see in Fig. 2 in itself
Change).
In order in accordance with the purpose of the invention, the first temperature T0It is selected to, more than 330K, be preferably close to 350K.By making
With the material of NiCoMnX races, it is possible to achieve this selection, wherein X ∈ { Al, In, Sb, Sn }, it is preferable that aluminium or tin.For this
For a little materials, in temperature T1Close to T0The differences of 30K (10 to) and it is high it is magnetized in the case of, transformation clearly, in 70emu/
Under the value of g.Especially, for Ni40Co10Mn33Al17:T0=347K, Mmax=90emu/g.
Thus, actuator of the invention includes the separate system being associated with coil.Especially, as shown in figure 3, root
The magnetic circuit of the magnetic frame 12 for including having fixed according to actuator of the invention 10, the magnetic frame 12 accommodates longitudinal coil 14,
Magnetic solenoid plunger 16 can be moved in the coil.Coil 14 is connected to supply lines, and depending on the electricity for wherein flowing
Plunger 16 is moved in stream, the induced field B in magnetic circuit, magnetic field along the axis of coil 14.
Device 18 including magneto-caloric material is equipped around coil 14, within framework 12, to form magnetic point in magnetic circuit
Road.Part flow arrangement 18 preferably forms the cylinder being contained in framework 12.Shunting can be used as overall offer by device 18, by
This its entirety is formed by magneto-caloric material.Preferably, thus part flow arrangement 18 carrys out shape by the disk being stacked or bar side by side or lamination
Into.Alternatively, part flow arrangement 18 can include support member, be associated with the support member or there are some integrated wherein
Magneto-caloric material, thus provides the simplified shape such as cylinder.Part flow arrangement 18 can also form a part for framework 12, with
The element that its associated suitable material is made, for example, be inserted into groove or be mutually attached.
As shown in Figure 3A, when rated current Inom is less than or equal to through the electric current I of coil 14, the temperature of component 10 is protected
It is not very high to hold, close to environment temperature.The temperature of part flow arrangement 18 remains less than the first temperature T0.Therefore, at part flow arrangement
In its non-magnetic state, and the impedance of magnetic circuit is stronger, similar to the impedance of the identical actuator without part flow arrangement.In magnetic
Property plunger 16 on the field force B that senses keep weak and less than trip threshold.Plunger 16 is therefore still in position of rest.
When electric current I exceedes overload values Is, raised in temperature online circle 14.In the presence of the rising of this temperature, shunting
Temperature at device 18 increases and is at least instantaneously in magnetization range, in T0And T1Between.Therefore, magneto-caloric material is switched to it
Magnetic state.As shown in Figure 3 B, the impedance reduction of part flow arrangement 18 and then the sensed flux B of communication and magnetic circuit.It is removable
Power on plunger 16 gradually increases, and goes above trip threshold.Thus removable plunger 16 moves, and it can unlock open circuit
The mechanism of device 1, to open the circuit that it is disposed therein.
It is advantageous that provided between part flow arrangement 18 and coil 14 directly thermally contacting.In fact, what magneto-caloric material was made
Part flow arrangement is presented its magnetic state according to temperature and its magnetic field for being undergone, and the value in temperature and magnetic field is come to their parts
Say the value depending on the electric current I flowed in coil.The size of system 10 allows to set the corresponding value of overload current Is,
To be positioned at [T in the range of the non magnetic/magnetic phase in version of material0、T1] temperature, and for determining part flow arrangement institute
The size of the field of sensing, so that plunger 16 can be moved, and the breaker 1 being associated with actuator 10 of therefore threading off.Especially
It is can to select the amount of the material for part flow arrangement, especially by length and cross section, or even selection device 18
The length of the circle of component and coil 14 and cross section.
It is noted that if electric current I exceedes the value of short circuit current Icc, it causes the magnetic saturation in whole loop, and with point
The state for flowing the magneto-caloric material of device 18 is unrelated.So as to, enough flux B pass through removable plunger 16 in all cases, with
Plunger is caused to move, and therefore trip circuit breaker 1 (Fig. 3 C).
Therefore, operation influence of the part flow arrangement 18 on actuator under short-circuit conditions 10 is very small.Further, since it is positioned at
In the leakage flux of coil 14, part flow arrangement 18 influences very little to the attraction that plunger 16 is may move under rated current Inom.Cause
This, actuator 10 can keep existing design and size according to the operation needed for its short-circuit cutting function and cut-out parameter,
The characteristic of even tripping system of the invention can provide optimization.
So as to be fitted in cutting unit, especially in molded shell as shown in Figure 1 and/or modularization low-voltage circuit breaker 1
Interior actuator of the invention 10 allows to carry out two kinds of defencive functions by single part, and this is pure magnetically and to be not required to
Heat bimetal strip.Therefore, because lacking for bimetal strip and save volume, the volume can be used for new spy in the housing
Levy.The overall heat of unit 1,10 dissipates and is also limited, and thereby increases its reliability and its energy efficiency.Finally, heat
The permission manufacturing cost that lacks of control is reduced, because the number of parts to be assembled is reduced.
Although describing the present invention with reference to the electromagnetic actuators 10 with removable plunger 16, the present invention does not limit to
In this.By the equipped of this magnetic thermal shunt device, other elements can be related to, to substitute the magnetic and Re Tuo of existing breaker
Buckle device.Especially, the use of saturable shunt magnetic system, the purpose is to according to the electric current guiding flux for flowing in the product
Almost most of, it goes for the electromagnetic actuators based on armature, in particular in cutting unit.
Thus, as shown in figure 4, cutting unit 1 ' includes moveable two contacts 4,6 relative to each other, in two contacts
At least one be associated with the moveable part of electromagnetic actuators 20, the magnetic circuit of electromagnetic actuators includes：
Substantially U-shaped fixed magnetic framework 22；
The coil 24 of current carrying lines, and the coil 24 are connected to by its end around the magnetic U-frame frame 22
At least one branch；
Electric current according to being flowed in coil 24 can be moved relative to framework 22 between position of rest and off-position
Armature 26, in the position of rest, there is gap between U-frame frame 22 and armature 26, and in the off-position, armature
The 26 closing U-frame framves 22；
The part flow arrangement 28 of magneto-caloric material, the part flow arrangement 28 is arranged in coil 24, substantially along the axle of coil 24
Line.
Same herein, the heating of part flow arrangement 28 flows through thermally contacting and/or passing through for coil therein 24 by with electric current
So that all or some electric currents flow into the Joule effect that active material brings and produce.Two functions of breaker 1 ' from there through
Single dropout and actuation means 20 are provided, more efficient from for technology, economy, environment and manufacture view.
Claims (9)
1. a kind of electromagnetic actuators (10,20), including magnetic circuit, the magnetic circuit has magnetic frame (12,22), can join in its end
It is connected to the coil on circuit (14,24) and can be relative to according to the intensity of the electric current flowed in the coil (14,24)
The mobile magnetic element (16,26) of the framework (12,22), it is characterised in that also including part flow arrangement (18,28), the shunting
Device extends along the axis of the coil (14,24), and the part flow arrangement (18,28) includes magneto-caloric material, as temperature exists
First temperature (T0) on and magnetize enhancing, and in the second temperature (T less than 420K1) place reaches maximum, first temperature
Degree (T0) it is more than or equal to 330K, the magnetization maximum is more than 40emu/g.
2. actuator as claimed in claim 1, wherein, the magneto-caloric material is the alloy of nickel and manganese.
3. actuator as claimed in claim 2, wherein, the magneto-caloric material is NiCoMnX types, wherein, X ∈ Al,
In,Sb,Sn}。
4. actuator as claimed any one in claims 1 to 3, wherein, the moveable magnetic element is helical tubing string
Plug (16), the plunger is contained in coil (14), and the plunger is moved within the coil, and the plunger and the coil are held
It is contained in framework (12).
5. actuator as claimed any one in claims 1 to 3, wherein, the part flow arrangement (18,28) is formed around coil
The cylinder of (14,24).
6. actuator as claimed any one in claims 1 to 3, wherein, the magnetic element is armature (26), the framework
(22) U-shaped is formed, at least one branch of the framework is by the coil (24) around armature (26) is relative to the framework
(22) it is mobile, to close U-frame frame.
7. a kind of cutting unit (1,1 '), including a pair relative to each other moveable contact (4,6) and as claim 1 to
Actuator (10,20) any one of 6, at least one of the contact is couple to the magnetic of the actuator (10,20)
On element (16,26).
8. a kind of tripping device for circuit breaker, including the actuator (10,20) as any one of claim 1 to 6, the cause
The magnetic element (16,26) and coil (14,24) of dynamic device (10,20) are adapted to couple on current carrying lines to be protected.
9. a kind of modularized circuit breaker (1), including housing, the housing accommodates trip gear as claimed in claim 8 and phase
For moveable a pair of contacts each other, the first contact (4) is coupled to the magnetic element (16,26) of the actuator (10,20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1261532 | 2012-12-03 | ||
| FR1261532A FR2999014B1 (en) | 2012-12-03 | 2012-12-03 | MAGNETOTHERMIC SHUNT ACTUATOR, ESPECIALLY FOR CIRCUIT BREAKER TRIPPING |
| PCT/FR2013/052836 WO2014087073A1 (en) | 2012-12-03 | 2013-11-25 | Actuator with a thermomagnetic shunt, especially for triggering a circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104781902A CN104781902A (en) | 2015-07-15 |
| CN104781902B true CN104781902B (en) | 2017-06-09 |
Family
ID=47666359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380058281.XA Active CN104781902B (en) | 2012-12-03 | 2013-11-25 | Actuator of the actuator with pyromagnetic part flow arrangement particularly for triggering breaker |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9355803B2 (en) |
| EP (1) | EP2926355B1 (en) |
| CN (1) | CN104781902B (en) |
| FR (1) | FR2999014B1 (en) |
| WO (1) | WO2014087073A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3028349B1 (en) * | 2014-11-12 | 2016-12-30 | Schneider Electric Ind Sas | ELECTROMAGNETIC ACTUATOR AND CIRCUIT BREAKER COMPRISING SUCH ACTUATOR |
| JP6421745B2 (en) * | 2015-12-11 | 2018-11-14 | オムロン株式会社 | relay |
| JP6575343B2 (en) | 2015-12-11 | 2019-09-18 | オムロン株式会社 | relay |
| US10726985B2 (en) * | 2018-03-22 | 2020-07-28 | Schaeffler Technologies AG & Co. KG | Multi-stage actuator assembly |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690528A (en) | 1950-12-07 | 1954-09-28 | Heinemann Electric Co | Delayed action magnetic circuit breaker |
| FR2682533B1 (en) | 1991-10-10 | 1993-11-26 | Merlin Gerin | ELECTRIC CIRCUIT BREAKER WITH INSERTION OF MAGNETIC TRIGGER SPIERS. |
| FR2772981B1 (en) | 1997-12-24 | 2000-01-21 | Schneider Electric Sa | SELECTIVE TRIGGERING DEVICE FOR CIRCUIT BREAKER |
| DE19847155A1 (en) | 1998-10-13 | 2000-04-20 | Kopp Heinrich Ag | Overcurrent trip device for circuit breakers, has heat conducting tubular body wound with coil, and with stop end and opposite expanded end for mounting and radial support of bimetallic spring plate |
| US6946941B2 (en) * | 2003-08-29 | 2005-09-20 | Astronautics Corporation Of America | Permanent magnet assembly |
| FR2875637B1 (en) | 2004-09-22 | 2006-10-27 | Schneider Electric Ind Sas | BISTABLE ELECTROMAGNETIC ACTUATOR WITH INTEGRATED LOCK. |
| CN101686029A (en) * | 2008-09-26 | 2010-03-31 | 方李明 | Thermomagnetic power plant |
| DE102008051939A1 (en) * | 2008-10-16 | 2010-04-22 | Siemens Aktiengesellschaft | Release mechanism for electrical installation apparatus i.e. line circuit breaker, has ferromagnetic body holding armature in predetermined position, where current flows through body when current of intensity flows through current coil |
| FR2972076B1 (en) * | 2011-02-25 | 2013-04-05 | Hager Electro Sas | MAGNETOTHERMIC ACTUATOR. |
| DE202012000111U1 (en) * | 2012-01-09 | 2012-07-11 | Basf Se | Material showing a huge magnetocaloric effect |
-
2012
- 2012-12-03 FR FR1261532A patent/FR2999014B1/en not_active Expired - Fee Related
-
2013
- 2013-11-25 WO PCT/FR2013/052836 patent/WO2014087073A1/en active Application Filing
- 2013-11-25 EP EP13808100.5A patent/EP2926355B1/en active Active
- 2013-11-25 US US14/647,363 patent/US9355803B2/en active Active
- 2013-11-25 CN CN201380058281.XA patent/CN104781902B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2999014B1 (en) | 2016-01-15 |
| FR2999014A1 (en) | 2014-06-06 |
| WO2014087073A1 (en) | 2014-06-12 |
| US20150318135A1 (en) | 2015-11-05 |
| US9355803B2 (en) | 2016-05-31 |
| CN104781902A (en) | 2015-07-15 |
| EP2926355A1 (en) | 2015-10-07 |
| EP2926355B1 (en) | 2019-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104781902B (en) | Actuator of the actuator with pyromagnetic part flow arrangement particularly for triggering breaker | |
| US8228655B2 (en) | Fault current limiter | |
| WO2007063394A3 (en) | Circuit breaker including open neutral interlock | |
| US20080284547A1 (en) | Magnetostrictive electrical switching device | |
| CN102339677B (en) | Contact protection circuit and high voltage relay comprising the same | |
| CN102971821B (en) | Overload relay without spring switchs | |
| CN103493167B (en) | Magnetic thermal actuator | |
| US4288769A (en) | Ambient temperature responsive trip device for static trip circuit breakers | |
| CN102339696B (en) | Circuit breaker with selective protection | |
| CN103875053B (en) | The structure external member of multipole circuit breaker | |
| CN205645723U (en) | Can realize short -circuit protection's controllable electromagnetism release | |
| CN104054154B (en) | For the pyromagnetic relieving mechanism of circuit breaker | |
| WO2005050690A1 (en) | Electric automatic switch | |
| JP2000132247A (en) | Superconduction current controller | |
| EP2852961B1 (en) | Electric circuit overload protecting device with integrated electricity consumption meter | |
| CN201773804U (en) | Circuit breaker with selective protection function | |
| CN203553078U (en) | Digital-analog electronic miniature circuit breaker | |
| US10283301B2 (en) | Electromagnetic actuator and circuit breaker comprising such an actuator | |
| CN205354982U (en) | High voltage circuit breaker | |
| CN100573774C (en) | Selective protection switch | |
| CN217444299U (en) | Novel circuit protector | |
| CN210956581U (en) | Miniature electromagnet with shunt resistor and miniature circuit breaker applying same | |
| CN102568959A (en) | Switch, especially for low voltage circuit breaker | |
| JP7127545B2 (en) | electromagnetic actuator | |
| CN201134666Y (en) | Overcurrent protecting electronic control apparatus for small circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |